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WASHINGTON, DC - JULY 01: A worker installs a row of sharp spikes along the top of the fence that surrounds the White House July 1, 2015 in Washington, DC. The U.S. Secret Service and the National Park Service installed the spikes as a temporary measure to keep people from climbing over the fence until a long term solution can be found. In September of 2014 a military veteran was able to scale the fence and run deep into the executive mansion. (Photo by Chip Somodevilla/Getty Images)